Manhole-cover.



No. 795,687. PATENTED, JULY 25, 1905. R. CAMERON.

MANHOLE COVER.

APPLICATION FILED OCT. 26.1904

&

Fl B ,cf f

I 1 I I I a I j I WITNESSES: INVENTOR By M I? I v. Alforney UNITEDSTATES PATENT OFFICE.

7 Specification of Letters Patent.

Patented July 25, 1905.

Application filed October 26,190 i. Serial No. 230,057.

To all whom it may concern.-

Be it known that I, ROBERT CAMERON, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts,have invented certain new and useful Improvements in Manhole Covers andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to. make and use the same. y

This invention relates to the covers of manholes and other similarobjects; and it consists in the novel construction and combination ofthe parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a vertical section through a manholeprovided with a cover according to this invention. Fig. 2 is a plan viewof the same.

A is the frame of the manhole, and B is a flange or ledge which projectsinternally and at a little distance below its top edge.

C is the cover, which rests on the said ledge, flange, or projection B.This cover has a stationary lug D at one side, which projects from itand extends below the said flange B. This lug is formed integral withthe cover or is otherwise rigidly secured to it.

E is a hole in the cover on the opposite side of its center from the lugD. The upper part at of this hole is recessed, and 6 representsfinger-notches in the cover on opposite sides of the hole. The hole Eand its recessed portion are preferably rectangular in shape.

F is a removable lug provided with a head f. This lug F is droppedthrough the hole E into engagement with the flange B, and its head f onages with the recessed part (1 of the hole, in wliich it fits snugly.These two lugs prevent the cover from being accidentally displaced.

When the cover is to be raised, the removable lug F is first lifted outof the hole by the fingers, and the cover can then be raised byinserting a finger or a hook into the hole E.

What I claim is The combination, with a frame provided with a projectingflange, of a cover which rests on the said flange and which is providedon one side with a lug D which projects under the said flange, saidcover having also at its other side a hole E having a rectangularrecessed portion d and finger-notches e at the sides of the saidrecessed portion, and a removable lug F which is dropped loosely throughthe hole E into engagement with the said flange and which has arectangular head which fits in the said recess d.

In testimony whereof I have affixed my signature in the presence of twowitnesses.

ROBERT CAMERON.

4.. iLixJ

